Characterization of electroplated platinum-iridium alloys on the nickel-base single crystal superalloy

Yingna Wu, Aya Suzuki, Hideyuki Murakami, Seiji Kuroda

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

As a high temperature protective layer, platinum-iridium alloys were electroplated on the nickel-base single crystal superalloy TMS-82+ from amidosulfuric acid solutions by the direct current method. It was found that Ir content in the films was always lower than the ratio of concentration ([Ir 3+]/([PtCl6 2-] + [Ir3+])) in the electrolytes, indicating that preferential deposition of Pt occurred in this study. The asdeposited Pt-Ir films formed an fee single phase structure with a granular surface. When Ir content exceeded 3 at%, Pt-Ir films exhibited the 〈111〉 preferred growth orientation. It was also found that pre-deposition of Ni and Pt promoted the deposition rate and changed composition of overlaying Pt-Ir films.

Original languageEnglish
Pages (from-to)2176-2179
Number of pages4
JournalMaterials Transactions
Volume46
Issue number10
DOIs
Publication statusPublished - 2005 Oct 1
Externally publishedYes

Fingerprint

iridium alloys
Iridium alloys
Platinum alloys
platinum alloys
heat resistant alloys
Nickel
Superalloys
Single crystals
nickel
single crystals
Phase structure
Deposition rates
Electrolytes
direct current
electrolytes
acids
Acids
platinum-iridium alloy
Chemical analysis

Keywords

  • Direct current method
  • Electroplating
  • Ni-base superalloy
  • Platinum-iridium films
  • Pre-deposition

ASJC Scopus subject areas

  • Materials Science(all)
  • Metals and Alloys

Cite this

Characterization of electroplated platinum-iridium alloys on the nickel-base single crystal superalloy. / Wu, Yingna; Suzuki, Aya; Murakami, Hideyuki; Kuroda, Seiji.

In: Materials Transactions, Vol. 46, No. 10, 01.10.2005, p. 2176-2179.

Research output: Contribution to journalArticle

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